CY43775
Dual-Port USB PD3.1 Controller
Description
The CY43775/CY43775H (CY43775) is a highly integrated USB Type-C® power delivery (PD) controller and targeted for dual-port or multiple-port Type-C PD adapter and charger applications. The CY43775 is compliant to USB Power Delivery Rev3.1 V1.8 Standard Power Range (SPR) with Programmable Power Supply (PPS) and Qualcomm® QC2.0/3.0/4/4+/5 protocols. With external resistor divider circuitry, the CY43775H could support PD3.1 Extended Power Range (EPR) 28V with Adjustable Voltage Supply (AVS).
The CY43775 is designed to support two DC/DC controllers or converters for two independent, 2C or 1C1A, chargers. Through Configuration Channels (CC) communication of each port, the CY43775 determines the requested Power Device Object (PDO) from attached Type-C device, and forms Constant Voltage (CV) and Constant Current (CC) loops with each DC/DC through its built-in DAC feedbacks. Furthermore, by controlling the power enable pin of each attached DC/DC, the CY43775 could support desired voltage output without using of output enable MOS. This mechanism optimizes overall system bill-of-material (BOM) as well as improvement of system efficiency.
For even lower system BOM cost optimization, the CY43775 supports common output voltage for simultaneous two-port attachment with 5V output charging mode. A single feedback loop is formed through OCDRV pin in the CY43775 to opto-couple to the power stage without any additional DC/DC controller / converter.
The CY43775 also supports I2C interface, and GPIO3/OTP is used as slave addressing for smart power sharing application of more than one CY43775. When the GPIO3/OTP pin is programmed as a current source, it could be used for thermal management purpose by attaching a negative-temperature-coefficient (NTC) resistor.
The CY43775 can offer comprehensive safety protection schemes, including over-voltage protection (OVP), under-voltage protection (UVP), over-current protection (OCP), short-circuit protection (SCP) and/or over-temperature protection (OTP). Besides, based on high-voltage process, the CY43775 offers VBUS short protection for CC1/CC2 pins up to 28V.
The CY43775 is designed to support two DC/DC controllers or converters for two independent, 2C or 1C1A, chargers. Through Configuration Channels (CC) communication of each port, the CY43775 determines the requested Power Device Object (PDO) from attached Type-C device, and forms Constant Voltage (CV) and Constant Current (CC) loops with each DC/DC through its built-in DAC feedbacks. Furthermore, by controlling the power enable pin of each attached DC/DC, the CY43775 could support desired voltage output without using of output enable MOS. This mechanism optimizes overall system bill-of-material (BOM) as well as improvement of system efficiency.
For even lower system BOM cost optimization, the CY43775 supports common output voltage for simultaneous two-port attachment with 5V output charging mode. A single feedback loop is formed through OCDRV pin in the CY43775 to opto-couple to the power stage without any additional DC/DC controller / converter.
The CY43775 also supports I2C interface, and GPIO3/OTP is used as slave addressing for smart power sharing application of more than one CY43775. When the GPIO3/OTP pin is programmed as a current source, it could be used for thermal management purpose by attaching a negative-temperature-coefficient (NTC) resistor.
The CY43775 can offer comprehensive safety protection schemes, including over-voltage protection (OVP), under-voltage protection (UVP), over-current protection (OCP), short-circuit protection (SCP) and/or over-temperature protection (OTP). Besides, based on high-voltage process, the CY43775 offers VBUS short protection for CC1/CC2 pins up to 28V.
Features
- Single chip dual-port USB PD source controller
- Compliant with USB PD Revision 3.1, V 1.8
- Support Qualcomm® QC2.0/3.0/4/4+/5 protocols
- Support SPR/PPS 3.3V to 21V with discharge function
- Support EPR/AVS up to 28V with resistor divider (CY43775H only)
- Low side current sensing resistor (5mΩ)
- Support opto-coupling feedback for AC/DC adapter (CY43775 only)
- Support 2 DAC feedback paths for the external DC/DCs
- Built-in regulator for CV and CC control
- Support e-Marker cable detection
- Support smart power sharing functions for dual-port charging with thermal power management
- Support I2C interface for multi-port applications
- OTP ROM for main firmware and MTP ROM for system configuration
- Support OCP/SCP/OTP/OVP/UVP with auto restart
- Support VBUS short protection for CC1/CC2 pins up to 28V
- Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)
- Halogen and Antimony Free. “Green” Device (Note 3)
Pin Assignments

Applications
- USB type-C multiple-ports PD3.1 PPS travel chargers
- DC-powered USB type-C multiple-port PD3.1 PPS car chargers
Notes:
1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS), 2011/65/EU (RoHS 2) & 2015/863/EU (RoHS 3) compliant.
2. Contact http://www.canyon-semi.com.tw for more information of Halogen- and Antimony-free, "Green" and Lead-free.
3. Halogen- and Antimony-free "Green” products are defined as those which contain <900ppm bromine, <900ppm chlorine (<1500ppm total Br + Cl) and <1000ppm antimony compounds.
USB Type-C® is a registered trademark of USB Implementers Forum.
Qualcomm® is a trademark of Qualcomm Incorporated, registered in the United States and other countries.
1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS), 2011/65/EU (RoHS 2) & 2015/863/EU (RoHS 3) compliant.
2. Contact http://www.canyon-semi.com.tw for more information of Halogen- and Antimony-free, "Green" and Lead-free.
3. Halogen- and Antimony-free "Green” products are defined as those which contain <900ppm bromine, <900ppm chlorine (<1500ppm total Br + Cl) and <1000ppm antimony compounds.
USB Type-C® is a registered trademark of USB Implementers Forum.
Qualcomm® is a trademark of Qualcomm Incorporated, registered in the United States and other countries.
Typical Applications Circuit
The CY43775 is a dual-channel PD3.1 PD source controller, and targeted for multiple-port Type-C PD adapter and charger applications.
Figure 1 shows a typical 2 independent-channel adapter, 2C or 1C1A, implemented by an CY43775 and two independent DC/DC controllers / converters. Once the PDO is determined through CC communication between adapter and its attached device, the CY43775 can control the DC/DCs to deliver the negotiated PDO output to the power consumer side through the DAC feedback (VFB_A and VFB_B) loop. By controlling power enable pin of the associated DC/DC controller, the CY43775 can support two independent charging ports without the need of a VBUS MOS switch at each port.
The CY43775 also supports I2C interface and GPIO3/OTP pin, used as slave addressing, for smart power sharing application of more than one CY43775. The GPIO3/OTP pin can also be programmed as a current source, so that CY43775 could be used for thermal management purpose by attaching a NTC resistor on GPIO3/OTP pin.
Figure 1 shows a typical 2 independent-channel adapter, 2C or 1C1A, implemented by an CY43775 and two independent DC/DC controllers / converters. Once the PDO is determined through CC communication between adapter and its attached device, the CY43775 can control the DC/DCs to deliver the negotiated PDO output to the power consumer side through the DAC feedback (VFB_A and VFB_B) loop. By controlling power enable pin of the associated DC/DC controller, the CY43775 can support two independent charging ports without the need of a VBUS MOS switch at each port.
The CY43775 also supports I2C interface and GPIO3/OTP pin, used as slave addressing, for smart power sharing application of more than one CY43775. The GPIO3/OTP pin can also be programmed as a current source, so that CY43775 could be used for thermal management purpose by attaching a NTC resistor on GPIO3/OTP pin.

For even lower system BOM cost solution, Figure 2 illustrates how an AC off line adapter is implemented by photo-coupling the OCDRV signal to the power stage without any additional DC/DC controller / converter, where the CY43775 chip can support 2C or 1A1C charging outputs with a common 5V voltage when two ports are used at the same time.

Typical Applications Circuit (Continued)
Furthermore, with the external resistor divider circuitry to reduce the input voltage to discharging points VBUS_A and VBUS_B, the CY43775H could support PD3.1 Extended Power Range (EPR) 28V with Adjustable Voltage Supply (AVS) for multi-port charger applications as shown in Figure 3 below.

Functional Block Diagram
